Work-support for lens-cutting machines.



A. PELLOW & L. G. SIMPSON. WORK SUPPORT FOR LENS CUTTING MACHINES.

APPLICATION FILED APR. 10, 1911.

1,1 1 9,1 1 1.. A Patented Dec. 1.1914;

2 SHEETS-SHEET 1.

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W R I I MGWMW A. FELLOW & L. G. SIMPSON. WORK SUPPORT FOR LENS CUTTING MACHINES.

AIBLIOATION FILED APR. 10, 1911.

Patented Dec. 1. 1914.

2 SHEETS-SHEET 2.

MI/I/ 26 2120 STATES-PATENT OFFICE. 1

BAUSCH 8r LOHB OPTIMAL 01 NEW YORK. I

To all whom it may concern:

Be itknown that we, An'rmm PnLLow and LEoN G. Snursomboth of Rochester, in the county of Monroe and State of New York, have invented certain new and useful "Improvements'in Work-Supports for Lens- .Cutting Machines; and we do hereby declare'the following to be av full, clear, and

- exact description of the same,,reference being had to the accompanying drawings,

' .forming a part of the specification, and to the reference-numerals marked thereon.

The present invention relates to .a work support and has for its particular object to provide a novel means for retaining a lens in operative relation to a cutting tool, on a lens cutting machine, although the inven-- tion is not limited-to this particular type of,

machine, but-is capable of being used with any machine embodying a cutting, grinding or other operating tool, where; it isnecessary to hold a surface against movement in the direction of itssupportingplane, and in engagement with the tool. 7 V To these and other ends the invention consists in certain improvements and com- 'binations of parts, all as will be hereinafter g pointed out in the claim at the end of the specification. y

In the drawings: Figure 1 is a view in side elevation illustrating the invention as embodiedin a-lens grindm machine. Fig.

2 is asectional view on the ine a- -a ofFig.

1. =Fig. 3 is a plan view of'the worksuport, showing a lens in position thereon. .ig. 4 is a view, also in plan, with the upper portion of the work support removed and showing the arrangement of the operating nut for elevating and lowering the suction cup. 5 is a sectional view on the line a-a of ig. 3,'showing the suction cup in lowered position. Fig. .6 is 'a sectional view on the line b'b of Figs. '3 and 4, showing a lens cutting machine comp a. forwardly extending arm 3, and rearwardly extending arms 4, the latter. constituting forfa verticalarbor 5, car rying the 0am story Specification of Letters Patent.

more fully. described,'the,novel features belholder-6, which rELLow minor: 0. smrson, or nocnnsrnn, imw ronmgassrenons 'ro comm, or nocnns'rnn, new YORK, a 1oom om'r1on wonx-surron'r ron. LENS-CUTTING monmns;

PatentedDec. 1, 1914.

V i Application filed April 10,1911. Serial No. 619,942.

is held against the pattern 40 by means of a suitable spring, as will hereinafter be described.-

Mounted upon the base 1 below the arm 3 is arranged a rotary work support 7, provided with a downwardly extending pintle to provide means for retaining a lens in firm .70-

engagement with the work support, in such a manner that it will be held in proper op- -erative relation to the tool vholder, and

against movement laterally-of the work support, while" at the same time permitting a slight amount of resiliency in the support. To this end, there is provided a suction cup 10, formed preferably of rubber, and arranged to be moved verticallyof the work support in the following manner: A recess so is formed inthe upper surface of the-work support 7,.and mountedlin the recess is a casing 11 adapted to receivethe suction cup and its coiiperating parts and being keyed to the worksupport n any suitable manner as by means of a locking pin 12 in engagement with the respective parts. Mounted in the casing 11 is a rotary controller plate 13 4 I provided at itscentral portion with a nut 14, and having at its outer edge a flange 15,

to which is secured an operating thumbpiece 16. Fixedly mounted on the casing 11, and arranged above the controller plate 13 is a platelf? provided with recesses 18 for a purpose which will presently be explained. A shoulder 19 is formed on the" \plate 17 and constitutes a support for the collar 20, which is preferably constructed of comparatively hard rubber or other slightly resilient substance, the upper edge of the ring constitutinga' rest for the lens,

as shownmFig. 5-.

The suction cup IOis to a stem 21,- being held on the stem between the head and the 23, the latter having struck "up portions'24 in engagement with-thebottom of the cup' so as to hold the cup more rigidly. The isprovided outwardly anu downwardly extending arms 25,

which engage the recesses 18 aforemen.--

tioned, and serve to guide the cup in its vertical movement. Mounted on the stem 21, below the disk 23, is a cam 26 adapted to engage the opening in the nut 14, so that as the latter is rotated, cam 26 is elevated or lowered, and with it the. suction cup 10.

An outwardly projecting flange 27 is formed on the suction cup, and secured to the inner face of collar is a ring 28 having an inwardly projecting flange 29 arranged to en-.

gage the flange 27 on the suction cup and limit the upward movement of the latter. The flange 27 of the suction cup is provided with recesses 30 whichvreceive the guiding arms 25, when the cup is raised, as shown in Fig. 6. Arranged above the plate 17, and

. attached thereto in any suitable manner, is

the suction cup so as to engage every portion of the outer edge of the latter, the an gular position of the. lens being determined by the stationary scale on the. cover. The controller plate is-then operated in the opposite direction, so .as to lower the cam and suction cup to the'position shown in Fig, '5,

whereby the lens engages the upper edge of the collar 20, and is held with suflicient rigidity by the vacuum producedbetween the lens and the bottom of the suction cup, v as indicated at 33. It will beapparent that osition shown otheradaptations of the suctiondevice might be employed, .and other means for raising and lowering the suction cup might: be used, without departing-from the spirit of the invention as defined -by,the appended claim. The rotarywork support is elevated into engagement with the tool holder by means of the pivoted lever 34, and is rotated .by the elongated pinion mounted on the shaft 36, which has ;;at its-upper end a pin-- ion 37 meshing with Ia'gear-wheel 38, the

latter being mounted-on the pattern ca'rryf ing sleeve and 'having an operatin' handle 39.? The pattern sleeve is provide with a suitable pattern 40, which engages the tool holder, the latter being held in'yieldable engagement with the pattern and operating upon the .work to markor cut thereon the shape of the pattern, this and the remaining parts last described being'old and-constituting no part of the present invention.

We claim as our invention; The. combination with a casing,io'f a rotary plate mounted on' the base of the cas-' ing, a .nut provided at the ycenterof said carrying the, suction cup, a cam mounted on' said stem and having gen gagement with the aforesaid nut, a flange on the suction'cup,: and means extending inwardly from said collar andhprojecting in the path of the flange. v

LEON G. SIMPSONQ Witnesses: i 'D'ANIELM.SMITH,A

Wn'mrlm woonwoifrrnr ARTHUR PELLow.

-plate; and movable therewith, a work supi porting colla'r mounted on the casing, a suction cup movable within said 'collar,- a stem" 

